The COMSEC switch provides five
settings for control of RT COMSEC
mode. Only the CT position is
normally used in field operations.
Two of the positions require the
operator to pull out on the knob to
move into/ out of these settings.
Figure 5-8. COMSEC Switch
COMSEC SWITCH POSITIONS AND USES
This setting places the radio in plain text (not secure) mode. To prevent
accidental selection of this position, the operator must pull out on the knob to
enter or leave the setting. The radio must be set to the PT position when using
the CUE feature.
This is the primary COMSEC setting for nets operating in the secure mode. To
make use of this setting, RT must have been loaded with required COMSEC
key or keys. Use of the CT function essentially prevents the enemy from
intercepting your communications.
This setting also provides for secure mode communications and is used when
needed to compensate for transmission delays. Seek the help of a
communications specialist if you think you need to use this feature of the
This setting may be used in some forms of Over-The-Air-Rekey (OTAR)
transmissions, but normal operator procedures do not require its use.
This position may be used to clear the RT of stored COMSEC keys by setting
the switch to Z for 5 seconds. Knob must be pulled out to enter or leave this
position. When turning the radio off by moving to OFF, it is not necessary to
use the COMSEC switch Z setting in order to clear COMSEC keys. (For
RT- 1523E, "Z" clears all data.)